Method and system of a time-frequency division multiplexed receiver
AssigneeCable Television Laboratories, Inc.
InventorsMU XU, ZHENSHENG JIA, HAIPENG ZHANG, LUIS ALBERTO CAMPOS
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Abstract
A method for extracting a plurality of data streams from a time-frequency division multiplexed (TFDM) signal includes determining a plurality of sub-channels of the TFDM signal, where each of the plurality of sub-channels has a respective one of a plurality of frequency ranges. The method also includes down-converting, based on the plurality of frequency ranges, the TFDM signal into a plurality of down-converted signals, where each down-converted signal corresponds to a respective one of the plurality of sub-channels. The method also includes extracting the plurality of data streams from a respective one of the plurality of down-converted signals.
Claims20
-19. (canceled)
A method, comprising:
- determining, at an optical line terminal (OLT), a plurality of sub-channels of a TFDM signal received from one or more optical network units (ONU's), each of the plurality of sub-channels having a respective one of a plurality of frequency ranges;
- calculating, for each of the plurality of sub-channels, a respective one of a plurality of sub-channel powers;
- determining, within each of the plurality of frequency ranges, an equalized power level of each respective sub-channel of the plurality of sub-channels;
- and
- transmitting, from the OLT to the one or more ONU's, a downlink signal including the equalized power level of each respective sub-channel of the plurality of sub-channels.
A method, comprising:
- transmitting, from an optical network unit (ONU) to an optical line terminal (OLT), a TFDM signal having a plurality of sub-channels of, each of the plurality of sub-channels having a respective one of a plurality of frequency ranges;
- after the transmitting, receiving, at the ONU from the OLT, a downlink signal defining an equalized power level of each respective sub-channel of the plurality of sub-channels;
- and
- transmitting a further TFDM signal according to the equalized power level.
A system, comprising:
- an optical line terminal (OLT) communicatively coupled with one or more optical network units (ONU's), the OLT including a processor and memory storing computer readable instructions that, when executed by the processor, control the OLT to:
- determine a plurality of sub-channels of a TFDM signal received from the one or more ONU's, each of the plurality of sub-channels having a respective one of a plurality of frequency ranges;
- calculate, for each of the plurality of sub-channels, a respective one of a plurality of sub-channel powers;
- determine, within each of the plurality of frequency ranges, an equalized power level of each respective sub-channel of the plurality of sub-channels;
- and
- transmit, from the OLT to the one or more ONU's, a downlink signal including the equalized power level of each respective sub-channel of the plurality of sub-channels.
Dependencies are inferred from the claim text.